codogo-react-widgets/lib/getJWT.js

Provides a unified way to access the styling of commonly used widgets across different apps

import jwtDecode from "jwt-decode";
import Channel from "js-channel";
import moment from "moment";

import { accountURL, scapholdAuthTokenStorageKey } from "./consts";

var tokenIsValid = function tokenIsValid(jwt) {
	try {
		jwtDecode(jwt);
		return true;
	} catch (e) {
		return false;
	}
};

var tokenInDate = function tokenInDate(jwt) {
	try {
		return moment.unix(jwtDecode(jwt).exp).isAfter(moment());
	} catch (e) {
		return false;
	}
};

var shouldTryToVendJWT = function shouldTryToVendJWT() {
	return window.location.origin === accountURL;
};

var callbackQueue = [];

var redirectToGetToken = function redirectToGetToken() {
	window.location = accountURL + "/app/login?come_from=" + window.location;
};

var retrivedJWT = function retrivedJWT(jwt) {
	if (shouldTryToVendJWT()) {
		return false;
	}

	if (!jwt || !tokenInDate(jwt)) {
		return redirectToGetToken();
	} else {
		localStorage.setItem(scapholdAuthTokenStorageKey, jwt);
	}

	callbackQueue.forEach(function (cb) {
		return cb(jwt);
	});
};

if (document.getElementById("codogo-account-iframe")) {
	Channel.build({
		window: document.getElementById("codogo-account-iframe").contentWindow,
		origin: "*",
		scope: "jwtVending",
		onReady: function onReady(chan) {
			chan.call({
				method: "getJWT",
				success: retrivedJWT,
				error: redirectToGetToken
			});
		}
	});
}

var getJWTFromIFrame = function getJWTFromIFrame() {
	if (shouldTryToVendJWT()) {
		return false;
	}

	return new Promise(function (done) {
		return callbackQueue.push(done);
	});
};

export default (function () {
	return Promise.resolve(localStorage.getItem(scapholdAuthTokenStorageKey)).then(function (jwt) {
		return jwt && tokenIsValid(jwt) && tokenInDate(jwt) ? jwt : getJWTFromIFrame();
	});
});